Hello, I don't usually write reviews, but buying a new smartphone online is not an easy decision, so I want to help new buyers.I bought an Iphone 4S 16 GB factory unlocked form MAT Industries. I previously contacted the seller to confirm if the phone was new and unlocked as advertised, and they confirmed this. When I received the Iphone it looked new and appeared to have the original box and packaging, but after some investigation I noticed that the IMEI number from the box, from the SIM tray and from the Iphone were all different. This is clearly a refurbished Iphone and this was not done by Apple. I don't think the accessories that came in the box are original too.Regarding this, the general experience and delivery with the seller was good, the Iphone has no marks, and it works most of the time, although the screen randomly freezes and I have to push the power button to fix it.I am not sure if this is a factory unlocked phone or was unlocked using other method, by I was able to confirm it was unlocked for three different carriers and I am also using it on a location outside USA.